Answer:
27 or 26.66
Step-by-step explanation:
all them all together then divide by the amount of nubers you have so
23+34+27+7+30+26+28+31+34 = 240
240/9 = 26.666
then round
X=62
Vertically opposite angles are equal
Y=44
Angles on a straight line add up to 180
Z =286
Because
180-x-y=74
360-74=286
Answer:
5.78% probability that exactly 2 of them use their smartphones in meetings or classes.
Step-by-step explanation:
For each adult, there are only two possible outcomes. Either they use their smarthphone in meetings or classes, or they do not. The probability of an adult using their smartphone on meetings or classes is independent of other adults. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
In which is the number of different combinations of x objects from a set of n elements, given by the following formula.
And p is the probability of X happening.
63% use them in meetings or classes.
This means that
7 adult smartphone users are randomly selected
This means that
Find the probability that exactly 2 of them use their smartphones in meetings or classes.
This is P(X = 2).
5.78% probability that exactly 2 of them use their smartphones in meetings or classes.
Answer:
3. increases by 228 cats
Step-by-step explanation:
The rate of the increase in cats is given by:
as this is the rate, we can write it as:
here t is the time in years. and S in the size of the colony
we're asked about the increase in size between the 10th and 4th year. So we need to know the sizes of the colony in those years.
We can find this out by integration. The above equation can be seen as a differential equation. Hence,
S(t) is the function of the size of the colony at time t. We need to find the differences of sizes between t = 10 and t = 4. Basically,
The C's will cancel out
Answer:
-10y+11.2
Step-by-step explanation: